MC908GZ48CFAE - 8-Bit HC08 48KB Flash MCU | NXP 48-LQFP
MPN: MC908GZ48CFAE ✗ End of Life| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
MC908GZ48CFAE Overview
An 8-bit microcontroller (MCU) is a single-chip computer integrating a CPU, program memory (Flash/ROM), data memory (RAM), timers, communication peripherals, and I/O on one silicon die. The HC08 family is a direct ancestor of the modern S08 and S12 families, used widely in automotive body electronics, appliance controls, and industrial sensor interfacing where small code size and proven tool chains matter more than raw throughput. Within the broader taxonomy, MC908GZ48CFAE belongs to: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC.
The MC908GZ48CFAE communicates with host tools and external devices through a serial monitor ROM, an SCI (serial communications interface), and a 10-bit ADC for analog signal acquisition. The 48 KB Flash supports in-application reprogramming for field firmware updates, while on-chip RAM provides working memory for stack and variables. Its 48-LQFP footprint gives designers ample I/O access for mixed-signal PCBs.
Architecturally, the part uses the M68HC08 CPU with a 16-bit internal index/Stack pointer and an 8-bit accumulator, giving efficient C and assembly coding for byte-oriented control loops. The device operates across an extended temperature range suitable for industrial and automotive under-hood subsystems and tolerates a wide supply range compatible with 5 V digital logic.
Typical applications include HVAC blower controllers, appliance user-interface panels, small motor drivers, sensor conditioning nodes, and CAN/LIN slave ECUs in cost-optimized vehicle body networks. Engineers select it when they need a stable, long-lifecycle 8-bit controller with a familiar toolchain (CodeWarrior HC08, P&E Micro debugger) rather than a Cortex-M0 equivalent.
When prototyping, route the oscillator/PLL pins with short traces to a 4 MHz crystal or ceramic resonator, and decouple VDD/VSS pairs with 100 nF plus bulk capacitors placed within 5 mm of each pair. The HC08 core has no internal voltage regulator on this variant, so an external regulated 5 V rail is required.
This page synthesizes distributor stock, lifecycle notes, and packaging-level substitutes not found on a single manufacturer page.
Drop-in alternatives for MC908GZ48CFAE — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MC908GZ48CFAE (same form factor and footprint) — differing in Package, ADC, Core, Program Memory Size, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S08GZ60F1MLF
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MC9S08GZ32F1MLF
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MC68HC908GZ60CFAE
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MC908GZ48CFAE Maximum Ratings & Electrical Characteristics
| Core | M68HC08 |
| Data Bus Width | 8 bit |
| Program Memory Size | 48 KB (48K x 8) Flash |
| Maximum Clock Frequency | 8 MHz |
| ADC Resolution | 10 bit |
| Package | 48-LQFP (7x7 mm) |
| Mounting Type | Surface Mount |
| Pin Count | 48 |
MC908GZ48CFAE 48-lqfp (7x7 mm) Pin Configuration Guide
Pin configuration for MC908GZ48CFAE (48-lqfp (7x7 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for MC908GZ48CFAE.
Refer to the datasheet for full pin configuration.
Typical Applications
MC908GZ48CFAE is suitable for 6 applications: HVAC Blower Motor Controller, White-Goods User Interface Panel, Automotive Body ECU Slave Node, Industrial Sensor Conditioning Node, Appliance Timer and Cycle Controller, Small Pump and Valve Controller.
HVAC Blower Motor Controller
The MC908GZ48CFAE drives brushless DC and AC induction blower motors in residential HVAC systems, where deterministic 8-bit control and 48 KB of Flash match legacy firmware budgets. Its SCI peripheral interfaces to wall thermostats and to main control boards via UART; the 10-bit ADC reads thermistor and current-sense inputs for closed-loop RPM regulation. With 8 MHz CPU and the HC08 instruction set, the part executes PID loops with microsecond latency, suitable for slow thermal dynamics rather than high-frequency inverter switching. For new designs, prefer the S08GZ upgrade, but original-equipment replacement builds continue to fit this MCU.
Recommended
White-Goods User Interface Panel
The MC908GZ48CFAE is well suited to washing-machine and dishwasher human-machine interface (HMI) panels that combine a 7-segment LCD, push-buttons, and a rotary encoder. The 48 KB Flash accommodates state-machine firmware plus small character libraries; SCI/UART links the panel to the main appliance controller. The HC08 deterministic behavior simplifies IEC 60730 safety-class firmware auditing for routine-test compliance. Power consumption stays low because the core halts in WAIT mode between keypad scans.
Recommended
Automotive Body ECU Slave Node
The MC908GZ48CFAE served as a cost-optimized slave node in older CAN/LIN body-electronic networks - controlling simple loads such as seat heaters, mirror motors, or interior lighting. Its SCI peripheral plus an external CAN/LIN transceiver (e.g., TJA1057) provide vehicle-bus connectivity, while the HC08 core's small code footprint supports the typical 4-8 KB of body-control firmware. The 48-LQFP package exposes enough I/O for relay drivers and switch matrices. Note: AEC-Q100 qualification status was not confirmed in verified data; verify before reusing in new automotive builds.
Recommended
Industrial Sensor Conditioning Node
Industrial transducer nodes - pressure transmitters, level sensors, low-rate vibration pickoffs - use the MC908GZ48CFAE as a low-power ADC-front-end and serial-bridge controller. The 10-bit ADC digitizes 4-20 mA loop or 0-10 V transducer outputs, and the SCI uplinks scaled readings to a PLC or gateway. With 48 KB of Flash the part can host linearization tables and modest HART/Modbus framing. Its legacy HC08 core is rugged for electrically noisy plant floors.
Recommended
Appliance Timer and Cycle Controller
Refrigerator defrost timers, microwave oven timers, and similar cycle controllers rely on a small 8-bit MCU such as the MC908GZ48CFAE to manage multi-stage timing loops, relay actuation, and user input decoding. The 48 KB Flash fits complex menu and diagnostic firmware; the HC08 timer module supports precise hardware-based scheduling without CPU overhead. Using a legacy 8-bit MCU keeps BOM cost low in a price-sensitive consumer appliance.
Recommended
Small Pump and Valve Controller
Peristaltic dosing pumps, solenoid valve matrices, and similar low-bandwidth actuators use the MC908GZ48CFAE as a deterministic supervisory controller, sequencing pumps, and reading flow feedback. The 10-bit ADC closes the loop on analog current/voltage feedback, while the SCI logs run statistics to a host. This 8-bit core is well matched to slow process dynamics where latency is in the millisecond range, not microseconds.
Recommended
Recommended Products Summary
Engineering reference data for MC908GZ48CFAE — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S08GZ60F1MLF | MC9S08GZ32F1MLF | MC68HC908GZ60CFAE |
|---|---|---|---|---|
| Package | 48-LQFP (7x7 mm) | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | HC08 (M68HC08) 8-bit | S08 (M68S08) 8-bit | S08 (M68S08) 8-bit | HC08 (M68HC08) 8-bit - identical family |
| Maximum CPU Frequency | 8 MHz | 40 MHz (5x faster) | 40 MHz (5x faster) | 8 MHz - same |
| Flash Memory | 48 KB | 60 KB (+25%) | 32 KB (-33%) | 60 KB (+25%) |
| ADC Resolution | 10 bit | 10 bit - same | 10 bit - same | 10 bit - same |
| Lifecycle Status | Obsolete (NXP) | Active / in production | Active / in production | Obsolete (same family) |
| Pin-to-Pin Compatible | Reference | Yes, drop-in 48-LQFP | Yes, drop-in 48-LQFP | Yes, drop-in 48-LQFP |
Key Differentiators
- Legacy 8-bit HC08 core toolchain maturity (vs MC9S08GZ60F1MLF)
- Lower unit cost in surplus market (vs MC9S08GZ60F1MLF)
- Slightly larger Flash than the S08GZ32 variant (vs MC9S08GZ32F1MLF)
Design Notes
The MC908GZ48CFAE has no internal voltage regulator on this 5V-rated variant, so the VDD pins must be fed from an external regulated 5 V rail (typical tolerance +/-5%). Decouple each VDD/VSS pair with a 100 nF ceramic placed within 5 mm of the relevant pins, and add a 10 uF bulk capacitor adjacent to the package. Estimated: assuming 20 mA active-core current at 8 MHz and 5 V, supply dissipation is approximately 100 mW; on the 48-LQFP with ~75 C/W theta_JA in still air, the junction rise is roughly 7.5 C above ambient.
Route the OSC1/OSC2 pins with traces shorter than 10 mm and keep them away from switching signal lines to avoid injected jitter on the CPU clock domain. Place the ground-return stitch between the MCU and the crystal/load capacitors to minimize ground-loop area. Add a guard ring around analog input pins (PTB0-PTB7) if their ADC channels are used, and avoid routing digital signals through the analog VREF/VRL pair when 10-bit resolution is required.
Do not assume the HC08's monitor ROM is always available - it depends on security-byte programming and the IRQ pin configuration, which can lock debug access. Always check the FPROT register setting before attempting in-circuit programming, and verify the part's serial number/derivative ID to confirm the mask revision matches your firmware. Estimated: typical code execution timing at 8 MHz CPU clock gives a 125 ns instruction cycle; loops running longer than ~50 ms indicate ISR latency issues to investigate.
Compliance Information
Compliance information was not present in the Verified Web Data or Internal Database Data provided. All compliance fields marked unknown rather than guessed. The 48-LQFP package on this legacy 5V HC08 part predates current RoHS-Pb-free mandates, but exact compliance status depends on the manufacturer's specific assembly lot.